Israel has said it suspects Iran or an Islamist militant group such as Hezbollah is behind the attack, a claim that has added to tension between Israel and Tehran. Iran, which has condemned the attack, has rejected Israel's claims.
MORE: http://www.cnn.com/2012/07/20/world/europe/bulgaria-israel-blast/index.html?hpt=wo_c2
See also...
Blast kills 14 in Pakistan
http://www.cnn.com/2012/07/18/world/asia/pakistan-blast/index.html?hpt=wo_bn4
